left front的用法和樣例：
例句
- Left descending arteries were ligated at the distal side of the second diagonal branch.
分離左冠狀動脈左前降支，第二對角支遠端結紮。 - The deep type of MB crosses the left anterior descending coronary artery and can twist the coronary artery and compromise its diastolic flow.
本症的深入型可見左前降枝彎曲及舒張期血流受到影響。
